Perspective.
When she inherited that crown, WWII was fresh in people's minds and the Korean War was still going. In those days, the monarchy, with all its blemishes, was still considered the 'norm'. She was handed the position and did an amazing job of representing the "good" aspects of its history and traditions.
   I'm sure that if, during her 70 years, the monarchy had been abolished, she'd have accepted THAT with dignity. GBR has had kings & queens for about a thousand years, and replacing it all with museums and re-enactments will/would be a slow & awkward process. I'd bet it will happen..possibly 'soon' in the great scheme of things. Britain votes on leaders and changes in an 'interesting' way, so I can barely imagine who will 'push the change button'.
   Right now, you all are seeing possibly one of the last great ceremonial processes with the funeral and then a coronation. It is important, no matter how half the citizens feel about it... and about the future.
   Watch and shrug.. with Brexit and immigration, etc, there are more pressing issues than how much space the media give this situation.